package file;

import java.io.File;
public class MkDirDemo {
    public static void main(String[] args) {
        /*
        File dir  = new File("./demo");
        if(dir.exists()){
            System.out.println("目录已存在");
        }else{
            dir.mkdir();
            System.out.println("目录已创建");
        }
         */
        File dir  = new File("./a/b/c/d");
        if(dir.exists()){
            System.out.println("目录已存在");
        }else{
            dir.mkdirs();
            System.out.println("目录已创建");
        }
    }
}
